Rock Identifier

Category

Igneous Or Sedimentary (Water Worn)

Browse igneous or sedimentary (water worn) specimens identified by the Rock Identifier community.

Learn about Igneous Or Sedimentary (Water Worn) in the encyclopedia

Water Opal

Enhydro Quartz

Carbonatite

Clear Beryl

Ice Opal

Hyalite Opal

Iolite

Conglomerate

Jelly Opal

Clear Obsidian

Coldwater Agate

Clear Tourmaline

Clear Tourmaline

Beach Pebble (Chert / Greywacke) (Silicon Dioxide (SiO2) / Quartz-rich Sandstone) — sedimentary

Beach Pebble (Chert / Greywacke)

Silicon Dioxide (SiO2) / Quartz-rich Sandstone

Basalt (Mafic Igneous Rock (composed primarily of plagioclase, pyroxene, and olivine)) — igneous

Basalt

Mafic Igneous Rock (composed primarily of plagioclase, pyroxene, and olivine)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Yellow Chalcedony (Quartz Pebble) (Silicon Dioxide (SiO2)) — mineral

Yellow Chalcedony (Quartz Pebble)

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone (with Iron Staining) (Clastic Sedimentary Rock (SiO2 with Fe2O3/FeO oxides)) — sedimentary

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (SiO2 with Fe2O3/FeO oxides)

Basalt Pebble (Extrusive Mafic Igneous Rock) — igneous

Basalt Pebble

Extrusive Mafic Igneous Rock

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Yellow Jasper (Silicon Dioxide (SiO2) with iron hydroxides) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides

Chalcedony (Agate/Jasper mix) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chalcedony (Agate/Jasper mix)

Cryptocrystalline Quartz (SiO2)

Carnelian Agate (Silicon Dioxide (SiO2) - variety of Chalcedony) — sedimentary

Carnelian Agate

Silicon Dioxide (SiO2) - variety of Chalcedony

Carnelian (Red Agate) (Chalcedony (SiO2 with Iron Oxide impurities)) — mineral

Carnelian (Red Agate)

Chalcedony (SiO2 with Iron Oxide impurities)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Water-worn pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (Water-worn pebble)

Silicon Dioxide (SiO2)

Chert (Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline Quartz (SiO2)

Beach Pebble (likely Basalt or Chert) (Volcanic Basalt / Microcrystalline Quartz) — igneous

Beach Pebble (likely Basalt or Chert)

Volcanic Basalt / Microcrystalline Quartz

Basalt River Stone (Basalt (Mafic volcanic rock)) — igneous

Basalt River Stone

Basalt (Mafic volcanic rock)

River Pebble (Grantoid/Quartzite) (Quartz-rich igneous rock (Granitoid)) — igneous

River Pebble (Grantoid/Quartzite)

Quartz-rich igneous rock (Granitoid)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Glauconitic Sandstone (or Greenstone) (Glauconitic Sandstone with Quartz) — sedimentary

Glauconitic Sandstone (or Greenstone)

Glauconitic Sandstone with Quartz

Yellow Quartz Pebble (Quartz (Silicon Dioxide, SiO2)) — mineral

Yellow Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Tumbled quartz crystal (Quartz (silicon dioxide, SiO₂)) — mineral

Tumbled quartz crystal

Quartz (silicon dioxide, SiO₂)

Milky Quartz with Iron Inclusions (Silicon Dioxide (SiO2)) — mineral

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Quartz (Milky or Smoky Quartz variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Smoky Quartz variety)

Silicon Dioxide (SiO2)

White Quartz (Milky Quartz) (Quartz (Silicon Dioxide, SiO2)) — mineral

White Quartz (Milky Quartz)

Quartz (Silicon Dioxide, SiO2)

Blue Chalcedony (Chalcedony (SiO2)) — mineral

Blue Chalcedony

Chalcedony (SiO2)

Basalt Pebble (Extrusive Igneous Rock) — igneous

Basalt Pebble

Extrusive Igneous Rock

Basalt Pebble (Extrusive Igneous Rock) — igneous

Basalt Pebble

Extrusive Igneous Rock

Banded Gneiss (Gneiss (High-grade Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Yellow Chalcedony (Agate) (Silicon Dioxide (SiO2)) — mineral

Yellow Chalcedony (Agate)

Silicon Dioxide (SiO2)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Unakite Epidote-Granite (Unakite (Epidotized Granite)) — metamorphic

Unakite Epidote-Granite

Unakite (Epidotized Granite)

Conglomerate (Conglomerate (Sedimentary Rock)) — sedimentary

Conglomerate

Conglomerate (Sedimentary Rock)

Milky and Smoky Quartz Cobble (Silicon Dioxide (SiO2)) — mineral

Milky and Smoky Quartz Cobble

Silicon Dioxide (SiO2)

Chalcedony (Carnelian/Agate) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Carnelian/Agate)

Silicon Dioxide (SiO2)

Mixed river stones and gravel (Polymictic alluvial clasts; individual pieces may include quartzite, granite, basalt, sandstone, limestone, and slate) — igneous, sedimentary, metamorphic

Mixed river stones and gravel

Polymictic alluvial clasts; individual pieces may include quartzite, granite, basalt, sandstone, limestone, and slate

igneous, sedimentary, metamorphic

Agate Pebble (Silicon dioxide (SiO2) - Chalcedony variety) — sedimentary

Agate Pebble

Silicon dioxide (SiO2) - Chalcedony variety

Red Sandstone Pebble (Arenite (Quartz Sandstone / Hematitic Sandstone)) — sedimentary

Red Sandstone Pebble

Arenite (Quartz Sandstone / Hematitic Sandstone)